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Compost Products <br />Two compost products that provide additional organic material and appear suited <br />for use at the Keenesburg site are Biocomp and Premium 3. The Biocomp <br />product is produced from non -hazardous liquid bio -solids and bulking agents with <br />a maximum pH of 7. This product meets EPA requirements (40 CFR 503-13) for <br />unrestricted use and distribution (see sample analysis Appendix R-5). The <br />Premium 3 product is produced from dairy manure and bedding with a maximum <br />pH of 9. Based on conversations with the manufacturers, Biocomp is <br />recommended for use on both currently seeded areas and unseeded areas. For <br />unseeded areas, the manufacturer also recommends the Premium 3 product. These <br />products can be applied with a manure spreader and the recommended application <br />rate is variable for currently seeded areas up to 33 tons per acre for unseeded <br />areas. The recommended application practice for the unseeded areas is a surficial <br />application with subsequent disking into the top six inches of soil prior to seeding. <br />For previously seeded and already established areas the disking step would be <br />eliminated. <br />Irrigation <br />No irrigation is proposed for use at the Keenesburg Mine. <br />Weed. Pest and Disease Control Measures <br />As an integral part of the revegetation plan, noxious weeds, plant pests and plant diseases <br />will be managed within the revegetated areas. Weed species to be controlled are <br />identified as those plant species identified by current state statute or regulation as <br />noxious. The species are not listed here as the list on noxious species changes regularly. <br />Plant pests are defined as those biological species that significantly predate the desirable <br />vegetation of the project site. Plant diseases are conditions caused by microorganisms <br />that significantly affect growth and development of desirable reclamation vegetation on <br />the project site. <br />The presence of noxious weeds and plant pests and diseases will be monitored at least <br />annually during the summer. Management measures will be undertaken where a single or <br />combination of noxious weed species, plant pests or disease comprises or shows a <br />deleterious effect to more than ten percent (10%) of the live vegetation. Further, where <br />noxious weed species or plant pests constitute more than twenty-five percent (25%) <br />relative vegetation cover in an area of 500 square feet or such area shows depredation or <br />plant impacts of the same magnitude, such area will be identified as a patch, and subject <br />to management measures, irrespective of the percentage of overall noxious weed cover in <br />the mitigation area. <br />Noxious weeds, plant pests or diseases may be controlled by any combination of cultural, <br />115c 4/06 <br />